怎么将相机拍出的照片传送到编辑页面，编辑页面照片和文本框，点击save按钮后封装成note保存到Room数据库，点击cancel按钮，返回相机拍照界面，并且删除该照片，完整代码

以下是一个实现该功能的完整代码：

首先，在布局文件中添加一个相机预览和一个保存/取消按钮：

<RelativeLayout
    android:id="@+id/camera_preview"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextureView
        android:id="@+id/texture_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

    <Button
        android:id="@+id/btn_save"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Save"
        android:layout_alignParentBottom="true"
        android:layout_alignParentStart="true"/>

    <Button
        android:id="@+id/btn_cancel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Cancel"
        android:layout_alignParentBottom="true"
        android:layout_alignParentEnd="true"/>

</RelativeLayout>

然后，在相机预览页面中，设置 TextureView 来预览相机拍摄的画面，并且获取相机权限：

public class CameraPreviewActivity extends AppCompatActivity implements TextureView.SurfaceTextureListener {

    private Camera mCamera;
    private TextureView mTextureView;
    private Button mBtnSave;
    private Button mBtnCancel;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_camera_preview);

        mTextureView = findViewById(R.id.texture_view);
        mTextureView.setSurfaceTextureListener(this);

        mBtnSave = findViewById(R.id.btn_save);
        mBtnSave.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                saveNote();
            }
        });

        mBtnCancel = findViewById(R.id.btn_cancel);
        mBtnCancel.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                cancelNote();
            }
        });
    }

    @Override
    public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
        mCamera = Camera.open();

        try {
            mCamera.setPreviewTexture(surface);
            mCamera.startPreview();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
        // Ignored, Camera does all the work for us
    }

    @Override
    public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
        mCamera.stopPreview();
        mCamera.release();
        return true;
    }

    @Override
    public void onSurfaceTextureUpdated(SurfaceTexture surface) {
        // Invoked every time there's a new Camera preview frame
    }

    private void saveNote() {
        // 将照片和文本框封装成 Note 对象，并保存到 Room 数据库中
    }

    private void cancelNote() {
        // 删除照片，并返回相机拍照界面
        File photoFile = new File(getExternalFilesDir(null), "photo.jpg");
        if (photoFile.exists()) {
            photoFile.delete();
        }

        Intent intent = new Intent(this, MainActivity.class);
        startActivity(intent);
        finish();
    }
}

在 saveNote 方法中，将照片和文本框封装成 Note 对象，并保存到 Room 数据库中：

private void saveNote() {
    EditText editText = findViewById(R.id.edit_text);
    String text = editText.getText().toString();

    File photoFile = new File(getExternalFilesDir(null), "photo.jpg");

    Note note = new Note();
    note.setText(text);
    note.setPhotoPath(photoFile.getAbsolutePath());

    AppDatabase.getDatabase(this).noteDao().insert(note);

    Intent intent = new Intent(this, MainActivity.class);
    startActivity(intent);
    finish();
}

在 cancelNote 方法中，删除照片，并返回相机拍照界面：

private void cancelNote() {
    File photoFile = new File(getExternalFilesDir(null), "photo.jpg");
    if (photoFile.exists()) {
        photoFile.delete();
    }

    Intent intent = new Intent(this, MainActivity.class);
    startActivity(intent);
    finish();
}

最后，在相机拍照界面中，启动相机预览页面：

public class MainActivity extends AppCompatActivity {

    private static final int REQUEST_IMAGE_CAPTURE = 1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Button btnTakePhoto = findViewById(R.id.btn_take_photo);
        btnTakePhoto.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                dispatchTakePictureIntent();
            }
        });
    }

    private void dispatchTakePictureIntent() {
        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
            File photoFile = null;
            try {
                photoFile = createImageFile();
            } catch (IOException ex) {
                ex.printStackTrace();
            }
            if (photoFile != null) {
                Uri photoURI = FileProvider.getUriForFile(this, "com.example.android.fileprovider", photoFile);
                takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
                startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
            }
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
            Intent intent = new Intent(this, CameraPreviewActivity.class);
            startActivity(intent);
            finish();
        }
    }

    private File createImageFile() throws IOException {
        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
        String imageFileName = "JPEG_" + timeStamp + "_";
        File storageDir = getExternalFilesDir(null);
        File image = File.createTempFile(
                imageFileName,  /* prefix */
                ".jpg",         /* suffix */
                storageDir      /* directory */
        );
        return image;
    }
}

在 onActivityResult 方法中，启动相机预览页面，如果拍摄成功，则会返回 RESULT_OK，否则不做任何处理。

createImageFile 方法用于创建一个临时文件来存储拍摄的照片。

注意，在 AndroidManifest.xml 文件中需要添加以下权限和 provider：

<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

<provider
    android:name="androidx.core.content.FileProvider"
    android:authorities="com.example.android.fileprovider"
    android:exported="false"
    android:grantUriPermissions="true">
    <meta-data
        android:name="android.support.FILE_PROVIDER_PATHS"
        android:resource="@xml/file_paths"/>
</provider>

其中，file_paths.xml 文件中定义了 FileProvider 的路径：

<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <external-files-path name="my_images" path="Pictures" />
</paths>